I have a dotnet project containing an Azure AD B2C Tenant.

I can successfully deploy the stack with pulumi up from my machine logged in to Azure as my personal user.

When trying to deploy the stack from Azure Devops using the Pulumi@1 task it fails with Unauthenticated error code:

Diagnostics:
2022-08-22T14:03:57.4210655Z   pulumi:pulumi:Stack (MyB2CStack-dev):
2022-08-22T14:03:57.4213464Z     error: update failed
2022-08-22T14:03:57.4213774Z  
2022-08-22T14:03:57.4215416Z   azure-native:azureactivedirectory:B2CTenant ([mycompanyb2cdev].onmicrosoft.com):
2022-08-22T14:03:57.4216032Z     error: Code="Unauthenticated" Message="Unauthenticated" Target="Authentication"

The service principal used as the azureSubscription is assigned the owner role in the subscription I am deploying to. I am able to deploy a resource group using the same stack and service principal.